World's Best Scientists 2026 revealed!
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Computer Science
Greece
2026

D-Index & Metrics

Computer Science

D-Index
66
Citations
19905
World Ranking
2298
National Ranking
8

Research.com Recognitions

  • 2026 - Research.com Computer Science in Greece Leader Award
  • 2025 - Research.com Computer Science in Greece Leader Award
  • 2022 - Research.com Computer Science in Greece Leader Award
  • 2013 - ACM Fellow For contributions to database query optimization, spatial data management, and data warehousing.
  • 2010 - IEEE Fellow For contributions to database query optimization, and spatial data management
  • 2008 - ACM Senior Member

Overview

Timos Sellis is affiliated with the Athena Research Center in Greece and has a research focus primarily in the field of Computer Science. Their work spans several subfields, including Artificial Intelligence, Statistical and Nonlinear Physics, Information Systems, Signal Processing, and Transportation. The scientist's research topics detail a concentration on Complex Network Analysis Techniques, Human Mobility and Location-Based Analysis, Advanced Text Analysis Techniques, Data Management and Algorithms, Opinion Dynamics and Social Influence, Data Quality and Management, and Sentiment Analysis and Opinion Mining.

The scientist has contributed frequently to specific publication venues such as:

  • IEEE Transactions on Knowledge and Data Engineering
  • arXiv (Cornell University)
  • Information Systems
  • Expert Systems with Applications
  • The VLDB Journal

Recent representative publications by Timos Sellis include:

  • "Community-diversified influence maximization in social networks," 2020, Information Systems
  • "Target-aware Holistic Influence Maximization in Spatial Social Networks," 2020, IEEE Transactions on Knowledge and Data Engineering
  • "Big data analytics in healthcare A systematic literature review and roadmap for practical implementation," 2021, IEEE/CAA Journal of Automatica Sinica
  • "Location-Centered House Price Prediction: A Multi-Task Learning Approach," 2022, ACM Transactions on Intelligent Systems and Technology
  • "Event Popularity Prediction Using Influential Hashtags From Social Media," 2020, IEEE Transactions on Knowledge and Data Engineering

The scientist collaborates frequently with a number of coauthors, including:

  • Yong-Bin Kang
  • Mohammed Eunus Ali
  • Jianxin Li
  • Xiangmin Zhou
  • Lei Chen

Timos Sellis holds distinctions such as the ACM Fellow award received in 2013 for contributions to database query optimization, spatial data management, and data warehousing. They were also named IEEE Fellow in 2010 for work related to database query optimization and spatial data management. Additionally, the ACM Senior Member title was awarded in 2008.

Best Publications

  • The R+-Tree: A Dynamic Index for Multi-Dimensional Objects

    Timos K. Sellis;Nick Roussopoulos;Christos Faloutsos

  • Multiple-query optimization

    Timos K. Sellis

  • DIANA-microT web server: elucidating microRNA functions through target prediction

    Manolis Maragkakis;Martin Reczko;Victor A. Simossis;Panagiotis Alexiou

  • Spatio-temporal indexing for large multimedia applications

    Y. Theoderidis;M. Vazirgiannis;T. Sellis

  • A survey of logical models for OLAP databases

    Panos Vassiliadis;Timos Sellis

  • Accurate microRNA target prediction correlates with protein repression levels

    Manolis Maragkakis;Manolis Maragkakis;Panagiotis Alexiou;Panagiotis Alexiou;Giorgos L. Papadopoulos;Martin Reczko

  • Topological relations in the world of minimum bounding rectangles: a study with R-trees

    Dimitris Papadias;Timos Sellis;Yannis Theodoridis;Max J. Egenhofer

  • A model for the prediction of R-tree performance

    Yannis Theodoridis;Timos Sellis

  • Proceedings of the 24th ACM International on Conference on Information and Knowledge Management

    James Bailey;Alistair Moffat;Charu C. Aggarwal;Maarten de Rijke

  • An efficient pictorial database system for PSQL

    N. Roussopoulos;C. Faloutsos;T. Sellis

  • Data Warehouse Configuration

    Dimitri Theodoratos;Timos K. Sellis

  • Optimizing ETL processes in data warehouses

    A. Simitsis;P. Vassiliadis;T. Sellis

  • A methodology for clustering XML documents by structure

    Theodore Dalamagas;Tao Cheng;Klaas-Jan Winkel;Timos Sellis

  • Parametric query optimization

    Yannis E. Ioannidis;Raymond T. Ng;Kyuseok Shim;Timos K. Sellis

  • Sampling Trajectory Streams with Spatiotemporal Criteria

    M. Potamias;K. Patroumpas;T. Sellis

  • Qualitative representation of spatial knowledge in two-dimensional space

    Dimitris Papadias;Timos Sellis

  • Analysis of object oriented spatial access methods

    Christos Faloutsos;Timos Sellis;Nick Roussopoulos

  • The Lowell database research self-assessment

    Serge Abiteboul;Rakesh Agrawal;Phil Bernstein;Mike Carey

  • Specifications for efficient indexing in spatiotemporal databases

    Y. Theodoridis;T. Sellis;A.N. Papadopoulos;Y. Manolopoulos

  • Community-diversified influence maximization in social networks

    Jianxin Li;Taotao Cai;Ke Deng;Xinjue Wang

  • Efficient cost models for spatial queries using R-trees

    Y. Theodoridis;E. Stefanakis;T. Sellis

Frequent Co-Authors

Nick Roussopoulos
Nick Roussopoulos University of Maryland, College Park
Christos Faloutsos
Christos Faloutsos Carnegie Mellon University
Yannis Theodoridis
Yannis Theodoridis University of Piraeus
Alkis Simitsis
Alkis Simitsis Micro Focus (United States)
Panos Vassiliadis
Panos Vassiliadis University of Ioannina
Michalis Vazirgiannis
Michalis Vazirgiannis École Polytechnique
Dimitris Papadias
Dimitris Papadias Hong Kong University of Science and Technology
Yannis E. Ioannidis
Yannis E. Ioannidis National and Kapodistrian University of Athens
Jeffrey Xu Yu
Jeffrey Xu Yu Chinese University of Hong Kong

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